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Inventory (Tables)
 12 Months Ended
Dec. 29, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventory consisted of the following (in thousands):
 
December 31,
 
2017
 
2016
Raw materials
$
498

 
$
863

Work in process
3,997

 
2,343

Finished goods
2,854

 
738

Total
$
7,349

 
$
3,944

 
 
 
 
Balance Sheet classification:
 
 
 
Inventory
$
6,657

 
$
3,338

Other long-term assets
692

 
606

Total
$
7,349

 
$
3,944